Minnesota Mining and Manufacturing Company

Norman Newman

Richard S Fisch

David J Scanlan

Alfredo Fenoglio

Ted J Lammers

Karen M Romaszewski

A method is provided for producing a multilayered element having a top coat. The method includes the application of an undercoating to the upper surface of a support and the application of a continuous top coat coating composition to the surface of the undercoating. The undercoating includes a binder while the top coat composition includes one or more dissolved or dispersed materials and one or more solvents. At least one of the solvents is compatible with the binder. The composition and coating weight of the top coat composition and of the undercoating are controlled such that the ratio T/B is less than or equal to 3, wherein

Method for producing a multilayered element having a top coat

A method for controlled delivery of corrosion inhibitors to a silver containing solution in a silver recovery device which utilizes a metallic fill for electron exchange. The method involves forming a structure of polyurethane foam within which a corrosion inhibitor is incorporated and placing the structure in the silver recovery device.

Controlled delivery of corrosion inhibitors for silver recovery

Silver is removed from used fix or bleach-fix baths by adding a compound of the general formula: ##STR1## wherein: X is an oxygen atom or imino group, R is an aryl, or a group of the formula

Fix and bleach-fix bath desilvering

Aqueous, non-fixing solutions which have a high efficiency in the removal of silver from a water-penetrable mass are comprised of:

Silver bleaching solutions

High contrast, rapid access, air stable, regenerable iron chelate developer solutions comprising at least two developer materials, at least one selected from each group comprising: 1. iron chelate developers and 2. an ascorbic acid developer.

High contrast, rapid access, air stable, regenerable iron chelate

Low contrast, rapid access, air stable, regenerable iron chelate developer solutions comprising at least two developer materials, at least one selected from each group comprising:

Low contrast, rapid access, air stable, regenerable iron chelate

Rapid access, air stable, regenerable iron chelate developers comprising at least three developer materials, at least one selected from each of the groups comprising:

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Saint Paul, MN, United States of America

Norman Newman